Display Device Individual Screen Brightness Control
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Solution Overview
Problem
Existing display devices struggle to individually adjust the brightness of multiple screen images displayed on a single display screen, as controlling the backlight's brightness affects all images uniformly, limiting power savings and image customization.
Innovation Solution
A display device comprising a liquid-crystal panel and a backlight with a required-brightness computation unit, brightness determination unit, and brightness control unit that calculates and adjusts the backlight's brightness for each image based on set brightness information, allowing for individual brightness control of screen images through light-source brightness control and image gradation adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the brightness of the backlight is adjusted to reduce power consumption, then the power consumption of the backlight is reduced, but the brightness of multiple screen images cannot be adjusted individually
Solution Approach 1:
The patent divides the display screen into multiple independent display regions, each capable of having its own brightness settings. The brightness control unit separately controls the backlight brightness for each display region based on the importance levels assigned to different screen images, allowing individual brightness adjustment while maintaining overall power efficiency.
Solution Approach 2:
Different brightness levels are applied to different local regions of the display screen according to the importance of the content being displayed. High-importance images receive higher brightness levels while low-importance images receive lower brightness levels, optimizing power consumption while preserving the ability to adjust brightness individually for each image.
2Illumination intensity
If the brightness of the backlight is increased to improve image visibility, then the brightness of the display screen is improved, but the power consumption of the backlight increases
Solution Approach 1:
The system dynamically adjusts backlight brightness in periodic intervals based on the displayed content and user-defined importance levels. Rather than maintaining constant high brightness, the backlight brightness is periodically optimized to match the current display requirements, reducing power consumption while maintaining adequate visibility.
Solution Approach 2:
The patent changes the brightness parameter of the backlight dynamically based on the importance levels of displayed images. By adjusting the brightness parameter according to content priority rather than maintaining a fixed high value, the system achieves good visibility for important content while reducing overall power consumption.
Data Source
AI summary
A display device includes: a display screen displaying screen images; a required-brightness computation unit computing required brightnesses for each of the screen images; a brightness determination unit comparing the required brightnesses computed for each of the screen images, and determining the screen image corresponding to the required brightness having highest brightness to be a maximum-required-brightness image; and a brightness control unit performing light-source brightness control and performing image gradation control, the light-source brightness control controlling the brightness of the light source so as to make the brightness of the light source the set brightness for the maximum-required-brightness image, the image gradation control controlling a gradation of the image displayed on the liquid-crystal panel in accordance with the brightness of the light source, so as to make a brightness of each of the screen images other than the maximum-required-brightness image the set brightness specified for each of the screen images.